Which pages controls registration form

[Patrik Isaksson]

PS 1.5.3.1 

 

Which pages controls the Customer Registration form ? and how do i alter the 2 step process 

 

Where customer has to first fill out email adress then press submit then is directed to the online creation form ? .. 

 

I want to only have the form instead of the 2 step process... 

 

What file should i be altering in ?